This volume brings together twelve papers by many of the most prominent applied general equilibrium modelers honoring Herbert Scarf. The contributors discuss some traditional as well as more contemporary topics in the field, including non-convexities in economy-wide models, tax policy, developmental modeling and energy modeling. The book also covers a range of new approaches, conceptual issues and computational algorithms. An introductory chapter written by the editors maps out issues and scenarios for the future evolution of applied general equilibrium.